primitive方式要复杂一些，但是效率要高一些 

primitive方式

        function createPrimitive(coordinate) {
            let polyline = new Cesium.GroundPolylineGeometry({
                positions: Cesium.Cartesian3.fromDegreesArray(coordinate.flat()),
                width: 25,
            })
            let instance = new Cesium.GeometryInstance({
                geometry : polyline,
            })
            let primitive = new Cesium.GroundPolylinePrimitive({
                geometryInstances : instance,
                appearance : new Cesium.PolylineMaterialAppearance({
                    material: new Cesium.Material({
                        fabric : {
                            type : 'PolylineGlow',
                            uniforms : {
                                color: Cesium.Color.fromCssColorString("#1039ff"),
                                glowPower: 0.1,
                            }
                        }
                    })
                })
            })
            viewer.scene.primitives.add(primitive);
        }

entity方式

        function createEntity(coordinate) {
            viewer.entities.add({
                polyline: {
                    positions: Cesium.Cartesian3.fromDegreesArray(coordinate.flat()),
                    width: 25,
                    material: new Cesium.PolylineGlowMaterialProperty({
                        glowPower: 0.1,
                        color: Cesium.Color.fromCssColorString("#1039ff"),
                    }),
                    clampToGround: true,
                }
            })
        }

效果